Stock bin blanking device used in SNCR (selective non-catalytic reduction) denitration system
By using pneumatic vibrators and quantitative cutting components in the SNCR denitrification system, the problems of blockage and uniform cutting of the urea silo are solved, and stable and orderly material transportation under harsh working conditions are achieved.
Patent Information
- Application Number
- CN202421158926.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-25
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-25
AI Technical Summary
In the SNCR denitrification system, the discharge part of the urea silo is easily blocked, and the weighing equipment cannot ensure long-term stable operation under high temperature and high powder conditions, resulting in difficulty in uniform discharge.
A silo discharge device including a pneumatic vibrator and a quantitative discharge assembly is designed to prevent urea particles from being blocked by a pneumatic vibrator, and uniform discharge is achieved using a step shaft-type feed piece and a motor-driven storage tank.
It effectively prevents blockage of the silo cutting part, ensures the orderly progress of denitrification operations, and achieves uniform fabric and stable transportation of materials without weighing equipment.
Smart Images
Figure CN222347780U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas denitration, in particular to a silo unloading device used in a SNCR denitration system. Background Art
[0002] SNCR is a mature NOx control technology. The existing SNCR denitrification technology, namely Selective Non-Catalytic Reduction (hereinafter referred to as SNCR) technology, is a clean denitrification technology that does not use a catalyst and uses a specific type of spray gun to atomize an amino reducing agent (such as ammonia water, urea solution, etc.) into droplets and directly sprays it into the furnace or cyclone separator within the temperature range of 850-1100°C to reduce and remove NOx in the flue gas to generate nitrogen and water.
[0003] In actual work, we found that when urea granules need to be added to the reactor as a reducing agent, two problems are likely to occur at the discharge point of the urea silo: 1. Since the reaction temperature is often above 850°C, some urea granules decompose and crystallize due to heat, causing blockage at the discharge point; 2. In order to discharge the material evenly according to the needs of use, weighing equipment is required, but the weighing equipment cannot guarantee long-term stable operation under high temperature and high powder conditions. Utility Model Content
[0004] The utility model aims to provide a silo unloading device for an SNCR denitration system, so as to solve the problem that the unloading part of the urea silo is easily blocked, and the weighing equipment loses its function under harsh working conditions, so that the unloading device cannot unload materials evenly according to the use requirements.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a silo unloading device for use in an SNCR denitrification system, comprising a silo, a silo support is fixedly arranged on the outer side of the silo, a side-opening top cover is hinged on the top of the silo, a discharge port is opened at the bottom of the silo, a vibration plate is arranged on the side wall of the silo near one end of the discharge port, a pneumatic vibrator is arranged on one side of the vibration plate, and a quantitative unloading assembly is arranged at the bottom of the discharge port.
[0006] Preferably, the side of the vibration plate close to the silo is a curved surface, the side of the vibration plate away from the silo is a flat surface, the curvature of the curved surface of the vibration plate is the same as the curvature of the side wall of the silo, and the vibration plate is welded to the side wall of the silo.
[0007] Preferably, the pneumatic vibrator comprises a vibrator body, the bottom of which is fixedly connected to the vibration plate by bolts. An air inlet for receiving external compressed gas is provided on one side of the vibrator body away from the vibration plate, an air outlet is provided on one side of the air inlet, and a muffler is provided on the air outlet.
[0008] Preferably, the quantitative feeding component includes a shell, the shell is divided into a connecting part fixedly connected to the discharge port, the connecting part is provided with a first channel which penetrates the interior of the silo, the bottom of the connecting part is fixedly connected with a conveying part, the conveying part is provided with an installation cavity, the two sides of the conveying part are fixedly connected with a first connecting piece and a second connecting piece, a material transporting piece is rotatably installed between the first connecting piece and the second connecting piece in the installation cavity, the bottom of the conveying part is fixedly connected with a feeding pipe, one end of the installation cavity is connected with the first channel, and the other end is connected with the feeding pipe.
[0009] Preferably, the material transport piece is a stepped shaft type, and is divided into a front section, a middle section and a tail section. The front section and the tail section have the same diameter, and are rotatably connected to the first connecting piece and the second connecting piece respectively. A plurality of material storage troughs are evenly spaced on the circumferential outer surface of the middle section of the material transport piece, and a key slot hole is opened inside the tail section, and one side of the key slot hole is connected to a motor through the second connecting piece for transmission.
[0010] A material level switch is also provided on the side wall of the silo near one end of the discharge port. The material level switch is provided on the opposite side of the pneumatic vibrator. The detection end of the material level switch passes through the side wall of the silo and contacts the internal material.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] (1) By installing a pneumatic vibrator, vibration is generated at the lower part of the silo near the discharge port to prevent urea particles from causing blockage at the discharge part of the silo, thereby ensuring the orderly progress of subsequent denitrification operations.
[0013] (2) A quantitative material discharge component is provided, in which a stepped shaft-type material transporting member is provided inside. The front section and the rear section of the material transporting member are respectively rotatably connected with the first connecting member and the second connecting member fixedly provided on the conveying part, and a key slot hole is provided in the rear section. An external motor is inserted into the key slot hole to drive the material transporting member to rotate. The material storage troughs are provided at equal intervals on the outer surface of the circumference of the middle section, and the material storage troughs are used to hold the material. When the material storage troughs rotate to the material discharge pipe through the rotation of the material transporting member, the material falls into the material discharge pipe and then enters the reactor to complete the material transportation, thereby achieving the purpose of uniform material distribution without weighing equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the planar structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the position relationship of the pneumatic vibrator in the utility model;
[0016] Figure 3 It is a schematic diagram of the internal planar structure of the quantitative feeding component in the utility model.
[0017] In the figure: 1. silo; 2. silo support; 3. discharge port; 4. vibration plate; 5. pneumatic vibrator; 51. vibrator body; 52. air inlet; 53. muffler; 6. quantitative unloading assembly; 61. shell; 611. connecting part; 612. first channel; 613. conveying part; 614. first connecting piece; 615. second connecting piece; 62. material transporting piece; 621. front section; 622. middle section; 623. tail section; 624. material storage trough; 625. key slot hole; 63. unloading pipe; 7. material level switch; 8. motor. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.
[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0020] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0021] See also Figure 1-3 The utility model provides an embodiment: a silo unloading device for an SNCR denitration system, comprising a silo 1, a silo support 2 is fixedly arranged on the outer side of the silo 1, the silo 1 is supported by the silo support 2, a side-opening top cover is hinged on the top of the silo 1, a handle is arranged on one side of the top of the side-opening top cover, when in use, the side-opening top cover can be opened by the handle to feed the inside of the silo 1, a discharge port 3 is arranged at the bottom of the silo 1, a vibration plate 4 is arranged on the side wall of the silo 1 close to the discharge port 3, wherein the side of the vibration plate 4 close to the silo is an arc surface, and the side of the vibration plate 4 away from the silo is a plane, the arc surface curvature of the vibration plate 4 is the same as the curvature of the side wall of the silo 1, so that the vibration plate 4 can fit the side wall of the silo 1 more closely and transmit vibration. The vibration is more obvious. The vibration plate 4 is welded to the side wall of the silo 1. A pneumatic vibrator 5 is arranged on one side of the vibration plate 4. The pneumatic vibrator 5 includes a vibrator body 51. The bottom of the vibrator body 51 is fixedly connected to the vibration plate 4 by bolts. An air inlet 52 for connecting to external high-pressure gas is arranged on the side of the vibrator body 51 away from the vibration plate 4. An air outlet is arranged on one side of the air inlet 52. A muffler 53 is arranged on the air outlet. The high-pressure gas discharged from an external air compressor is connected to the air inlet 52 through an air pipe. The vibrator body 51 generates a vibration force. The vibrator body 51 adopts a piston-type pneumatic vibrator commonly seen in the market. The vibration of the side wall of the silo 1 is triggered by the vibrator body 51 to prevent urea granules from crystallizing and clogging.
[0022] In order to achieve uniform material discharge, a quantitative material discharge component 6 is provided at the bottom of the discharge port 3. The quantitative material discharge component 6 includes a shell 61. The shell 61 is divided into a connecting portion 611 fixedly connected to the discharge port 3. A first channel 612 communicating with the interior of the silo 1 is provided inside the connecting portion 611. A conveying portion 613 is fixedly connected to the bottom of the connecting portion 611. An installation cavity is provided inside the conveying portion 613. First connecting pieces 614 and second connecting pieces 615 are fixedly connected to both sides of the conveying portion 613. A material transporting piece 62 is rotatably installed between the first connecting piece 614 and the second connecting piece 615 inside the installation cavity. A material discharge pipe 63 is fixedly connected to the bottom of the conveying portion 613. One end of the installation cavity is connected to the first channel 612, and the other end is connected to the material discharge pipe 63. The material enters the first channel 612 in the shell 1 from the discharge port 3 of the silo 1. The material contacts the material transporting piece 62 from the first channel 612, and is quantitatively transported by the material transporting piece 62 and discharged from the material discharge pipe 63 at the bottom to the external reactor.
[0023] Further, the material transport member 62 is a stepped shaft type, and the material transport member 62 is divided into a front section 621, a middle section 622 and a tail section 623. The diameters of the front section 621 and the tail section 623 are the same, and the diameters of the front end 612 and the tail section 623 are smaller than those of the middle section 622. The front section 621 and the tail section 623 are rotatably connected to the first connecting member 614 and the second connecting member 615 respectively. The axis of the material transport member 62 is arranged perpendicular to the axis of the silo 1. A plurality of material storage grooves 624 are evenly spaced on the circumferential outer surface of the middle section of the material transport member 62. A key slot hole 625 is opened inside the tail section 623. One side of the key slot hole 625 passes through the second connecting member 615 for transmission connection. The motor 8 is inserted into the key slot 625 through the output end of the motor 8, driving the material transporting piece 62 to rotate, and the material in the first channel 612 falls into one of the storage troughs 624. When the storage trough 624 continues to rotate and rotates until the slot of the storage trough 624 faces the discharge pipe 63, the material falls into the discharge pipe 63 and then enters the reactor, and circulates in sequence. The amount of material contained in each storage trough 624 is certain, and each storage trough 624 will participate in the work of conveying materials in turn. If you want to discharge more materials within the specified time, you can achieve this by adjusting the speed of the motor 8, thereby achieving the purpose of uniform material distribution.
[0024] Furthermore, in order to prevent the material in the silo 1 from being less than the specified value, a level switch 7 is provided on the side wall of the silo 1 near the discharge port 3. The level switch 7 is provided on the opposite side of the pneumatic vibrator 5. The detection end of the level switch 7 passes through the side wall of the silo 1 and contacts the internal material. When the material is less than the set value, the level switch 7 can sound an alarm, thereby serving the purpose of reminding the silo 1 of the remaining material.
[0025] When the embodiment of the present application is in use: the material is poured into the feed bin by opening the side opening top cover, and the material enters the quantitative unloading component 6 from the discharge port 3. First, the material enters the first channel 612 of the connecting portion 61, and a part of the material enters the storage trough 624 located closest to the first channel 612. The motor 8 is started to drive the material transporting member 62 to rotate. When the storage trough 624 filled with material rotates a certain angle, the next storage trough 624 is filled with material, and each subsequent storage trough 624 is filled with material in turn. When the first storage trough 624 is filled with material, the material is filled with material. When the storage trough 624 full of materials rotates to the point where the slot faces the discharge pipe 63, the materials fall into the discharge pipe 63 and then enter the external reactor. Each subsequent storage trough 624 will drop the materials when passing this position in sequence, and uniform material discharge can be achieved when the motor 8 rotates at a constant speed. When the amount of materials dropped is increased within a specified time, it is only necessary to increase the rotation speed of the motor 8. Each storage trough 624 will increase the frequency of rotation from the first channel 612 to the discharge pipe 63 within a specified time, thereby increasing the amount of materials transported.
[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A silo unloading device for a SNCR denitration system, comprising a silo (1), a silo support (2) is fixedly arranged on the outside of the silo (1), a side-opening top cover is hingedly connected to the top of the silo (1), and a discharge port (3) is opened at the bottom of the silo (1), characterized in that: A vibration plate (4) is arranged on the side wall of the silo (1) near one end of the discharge port (3), a pneumatic vibrator (5) is arranged on one side of the vibration plate (4), and a quantitative discharge assembly (6) is arranged at the bottom of the discharge port (3).
2. The silo unloading device for the SNCR denitration system according to claim 1, characterized in that: The side of the vibration plate (4) close to the silo is a curved surface, and the side of the vibration plate (4) away from the silo is a flat surface. The curvature of the curved surface of the vibration plate (4) is the same as the curvature of the side wall of the silo (1). The vibration plate (4) is welded to the side wall of the silo (1).
3. The silo unloading device for the SNCR denitration system according to claim 2, characterized in that: The pneumatic vibrator (5) comprises a vibrator body (51), the bottom of which is fixedly connected to the vibration plate (4) by means of bolts, an air inlet (52) for receiving external compressed gas is provided on a side of the vibrator body (51) away from the vibration plate (4), an air outlet is provided on one side of the air inlet (52), and a muffler (53) is provided on the air outlet.
4. The silo unloading device for the SNCR denitration system according to claim 1, characterized in that: The quantitative feeding component (6) comprises a shell (61), wherein the shell (61) is divided into a connecting portion (611) fixedly connected to the discharge port (3), a first channel (612) communicating with the interior of the silo (1) is provided inside the connecting portion (611), a conveying portion (613) is fixedly connected to the bottom of the connecting portion (611), an installation cavity is provided inside the conveying portion (613), a first connecting member (614) and a second connecting member (615) are fixedly connected to the two sides of the conveying portion (613), a material transporting member (62) is rotatably installed between the first connecting member (614) and the second connecting member (615) inside the installation cavity, a feeding pipe (63) is fixedly connected to the bottom of the conveying portion (613), one end of the installation cavity is connected to the first channel (612), and the other end is connected to the feeding pipe (63).
5. The silo unloading device for the SNCR denitration system according to claim 4, characterized in that: The material transporting member (62) is a stepped shaft type, and is divided into a front section (621), a middle section (622) and a tail section (623). The front section (621) and the tail section (623) have the same diameter, and the front section (621) and the tail section (623) are rotatably connected to the first connecting member (614) and the second connecting member (615) respectively. A plurality of material storage grooves (624) are evenly spaced on the circumferential outer surface of the middle section of the material transporting member (62), and a key slot hole (625) is opened inside the tail section (623), and one side of the key slot hole (625) passes through the second connecting member (615) and is transmission-connected to a motor (8).
6. The silo unloading device for the SNCR denitration system according to claim 1, characterized in that: A material level switch (7) is also provided on the side wall of the silo (1) near the discharge port (3). The material level switch (7) is provided on the opposite side of the pneumatic vibrator (5). The detection end of the material level switch (7) passes through the side wall of the silo (1) and contacts the internal material.